------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 5191 at kernel/locking/lockdep.c:234 hlock_class kernel/locking/lockdep.c:234 [inline] WARNING: CPU: 0 PID: 5191 at kernel/locking/lockdep.c:234 check_wait_context kernel/locking/lockdep.c:4852 [inline] WARNING: CPU: 0 PID: 5191 at kernel/locking/lockdep.c:234 __lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178 Modules linked in: CPU: 0 UID: 0 PID: 5191 Comm: klogd Not tainted 6.14.0-rc7-syzkaller-00205-g586de92313fc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:hlock_class kernel/locking/lockdep.c:234 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4852 [inline] RIP: 0010:__lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178 Code: 00 00 83 3d b1 4f a0 0e 00 75 23 90 48 c7 c7 40 b2 2a 8c 48 c7 c6 40 b5 2a 8c e8 47 bd e4 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f RSP: 0018:ffffc900032d6fb0 EFLAGS: 00010046 RAX: e5a1c09a539ae800 RBX: 0000000000001b20 RCX: ffff88807eb99e00 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000000c1b20 R08: ffffffff81819e52 R09: fffffbfff1d3a69c R10: dffffc0000000000 R11: fffffbfff1d3a69c R12: ffff88807eb9a8d4 R13: 0000000000000005 R14: 1ffff1100fd73527 R15: ffff88807eb9a938 FS: 00007fbec74be380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d6f8ff8 CR3: 00000000341aa000 CR4: 0000000000350ef0 Call Trace: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606 raw_spin_rq_lock kernel/sched/sched.h:1521 [inline] rq_lock kernel/sched/sched.h:1852 [inline] __schedule+0x357/0x4c90 kernel/sched/core.c:6688 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7087 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:__slab_free+0x281/0x380 Code: 73 3c 0f 1f 44 00 00 4c 89 ef 48 8b 74 24 10 e8 95 7c ed 09 eb a2 0f 1f 44 00 00 31 c0 4d 85 e4 75 96 84 c0 75 92 48 8b 3c 24 <48> 8b 74 24 08 ba 01 00 00 00 e8 00 f1 ff ff e9 7a ff ff ff 4d 85 RSP: 0018:ffffc900032d75e0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888021bb0000 RCX: 0000000000040003 RDX: 0000000000040004 RSI: ffffea000086ec00 RDI: ffff88801b042140 RBP: 0000000000040004 R08: 0000000000000001 R09: ffffffff8229306f R10: dffffc0000000000 R11: fffffbfff28a9b0f R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000040003 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4216 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:596 alloc_skb include/linux/skbuff.h:1331 [inline] alloc_skb_with_frags+0xc3/0x820 net/core/skbuff.c:6522 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2914 unix_dgram_sendmsg+0x5e8/0x1df0 net/unix/af_unix.c:2017 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:733 __sys_sendto+0x363/0x4c0 net/socket.c:2187 __do_sys_sendto net/socket.c:2194 [inline] __se_sys_sendto net/socket.c:2190 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2190 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbec76209b5 Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffee270d4d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fbec76209b5 RDX: 0000000000000051 RSI: 000056343acdbd10 RDI: 0000000000000003 RBP: 000056343acd4910 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013 R13: 00007fbec77ae212 R14: 00007ffee270d5d8 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 73 3c jae 0x3e 2: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 7: 4c 89 ef mov %r13,%rdi a: 48 8b 74 24 10 mov 0x10(%rsp),%rsi f: e8 95 7c ed 09 call 0x9ed7ca9 14: eb a2 jmp 0xffffffb8 16: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 1b: 31 c0 xor %eax,%eax 1d: 4d 85 e4 test %r12,%r12 20: 75 96 jne 0xffffffb8 22: 84 c0 test %al,%al 24: 75 92 jne 0xffffffb8 26: 48 8b 3c 24 mov (%rsp),%rdi * 2a: 48 8b 74 24 08 mov 0x8(%rsp),%rsi <-- trapping instruction 2f: ba 01 00 00 00 mov $0x1,%edx 34: e8 00 f1 ff ff call 0xfffff139 39: e9 7a ff ff ff jmp 0xffffffb8 3e: 4d rex.WRB 3f: 85 .byte 0x85